What decides this set is how far down you go and where your elbows point. Let your elbows flare out slightly and your torso lean forward to bias your chest, or keep them tucked close and your body upright to bias your triceps — pick one and stay consistent through the set. Lower until your shoulders dip just below your elbows, no further, then press back up to full extension without shrugging. Keep your shoulders down and back throughout; if they creep up toward your ears, you're loading the joint instead of the muscle.